Man walking past invisible bodies. Photo: Getty Images
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Scientists suggest invisibility as a cure for anxiety

Neuroscientists have made the surprise discovery that the sensation of invisibly reduces responses to anxiety.

Have you ever felt fear and anxiety from standing in front of a large audience and giving a speech? Or how about having to get up in class and talk to other students? While it's normal in situations like these to wish for the ground to swallow you up, some scientists have suggested a slightly different remedy for anxiety - invisibility.

Invisibility has long featured in myths and fiction, but several advances in material sciences have demonstrated that the cloaking of large (living) objects - just like how the invisibility cloak works in Harry Potter - is becoming a realistic prospect. In the field of material sciences, the general concept of invisibility cloaking is actually fairly simple.

Theoretically, all that's needed is a material that guides visible light (or another wave, like EM waves or heat fluxaround an object, and anything within the gap it leaves will be rendered "invisible" to someone standing at the light source:

Light moves around the object (or person) as though it isn't there. Image: Trevor Johnston/

In practice, this is hard to achieve, as most naturally occurring materials reflect light, cast shadows and produce a reflection. However, hi-tech and exotic materials called "metamaterials" have made light bending possible. (Although latest research suggest that ordinary lenses can do just the trick!)

H G Wells, a man ahead of his time, wrote the The Invisible Man in 1897. The novel is about a protagonist who invents a method to change the human body’s refractory index to that of the air, rendering it invisible. (The twist comes when he performs the method on himself and can’t reverse it - but that’s beside the point.) The refractive index is the ratio between how light passes through a vacuum, and how it passes through any other medium; it’s the reason a spoon will look bent when placed in a glass of water. If water has a negative refractive index, the spoon would look as though as was bending back on itself instead.

In a recent paper in Scientific Reports, graduate students Arvid Guterstam and Zakaryah Abdulkarim and their advisor Henrik Ehrsson, a neuroscience professor at the Karolinska Institutet in Stockholm, said they believe invisibility cloaking of the human body is a thing of the future, and believe it’s high time we delve into what it feels like to be invisible.

To do this, Guterstam, Abdulkarim, and Ehrsson used virtual reality. In one of their experiments, 23 people were provided with a set of head-mounted displays (HMD), and were asked to look at their feet. The experimenter - Abdulkarim - stroked their arms, legs, and torso with a paintbrush with one hand, and at the same time, made identical motions with a second paintbrush with the other hand, on an invisible body or a mannequin. A pair of downward-facing cameras that were either mounted on a tripod or on the head of a mannequin sent a real-time video feed to the participants HMDs, giving them the sensation of being invisible, or making a body swap with a mannequin:

Study co-author Zakaryah Abdulkarim (middle) creates the invisible body illusion on a participant (left) wearing a set of head-mounted displays connected to a pair of cameras. Photo: Staffan Larsson

Here's the surprise: after finishing with the paintbrush, each participant slowly lifted their gaze through their HMDs to find that they were being watched by a scornful-looking audience (consisting of 11 scientists instructed to stare at the participant). Quite creepy, and perhaps enough to through most people off - however, on a 100-point scale, participants reported their stress level as about 25 per cent lower, on average, when in a state of invisibility, and about a third less than in the mannequin version. The state of invisibility also lowered heart rates by a few beats per minute, suggesting that stress is intertwined with physiology.

The researchers write: “Our results demonstrate that healthy individuals can experience the illusion of owning an invisible full body." They suggest their results could spur on better a design for virtual-reality based therapies for social anxiety, and may also help give neuroscientists gain new insight into phantom limb illusions.

Tosin Thompson writes about science and was the New Statesman's 2015 Wellcome Trust Scholar. 

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“There will be an absolute meltdown in 2020” : what’s holding back the introduction of electronic voting?

The government's reluctance to implement electronic voting will affect our future, and in – the case of Brexit – may have already dramatically affected our past. 

Imagine, just for a second, that the situation was reversed. Imagine if, for a hundred years, we had scanned, swiped, and tapped our votes into a secure, fool-proof electronic system and someone waddled along and said, “Alright lads, how about we try pencil and paper?”. How about we desperately try to find a spare hour to shuffle to the village hall in the rain and scratch an “X” onto a scrap of paper with a stubby bit of lead, and then let a volunteer named Deidre count it at two am? What could possibly go wrong?

If you picture this scenario – posited by my colleague Anna – then it quickly becomes clear how ridiculous it is that the UK has not yet implemented electronic voting in any lasting way, shape, or form. Not only are we not on board with popping online to vote, we’re also reluctant to use technology when it comes to marking our ballots, authenticating voters’ identities, and counting votes. Despite the success of electronic voting in countries such as Brazil, Estonia, and India, the UK continues to reject reform. Why?

 “I think the problem is political at the moment,” says Mike Summers, the program manager at Smartmatic, an electronic voting company who have run three national elections in the Philippines, have a 15 year contract with Belgium, and have counted around 3.7 billion electronic votes in 12 years. “I think there is a fear that if you enfranchise groups of younger people, then you don’t necessarily know how they’re going to vote.”

We can, however, make a pretty good guess. Smartmatic’s own research shows that 57 per cent of 18-24 year olds would be more likely to vote if they could do so online and 55 per cent said they would have used online voting at the last general election. As Labour's vote share could have been boosted at the last election if only more young people had turned out to vote, this might make electronic voting an uninviting prospect for Theresa May.

“Prior to the last parliamentary election the Labour party were vehemently in favour of electronic voting,” says Summers. “Things are moving very slowly compared to other developing and developed nations so our reading of the situation is that it’s a largely political one.”

The consequences of this inaction are severe. Holding off on a voting system that provides greater accessibility to all compromises the very notion of democracy, but it also has potentially more immediate repercussions. “In 2020 everything is going to hit the proverbial fan we’re going to be a laughing stock,” says Summers.

The reason for this is because of the wide array of elections sheduled for 2020. Not only will there be a general election, there are also police and crime commissioner elections, the London Assembly and the London mayoral elections, and also local elections. “There is real concern that because of the complexity of this event there is going to be an absolute meltdown.”

Electronic voting would help prevent such a meltdown by ensuring, among other things, that voters couldn’t accidentally mark a first past the post ballot with a preferential voting system (or vice versa), that votes could be counted faster, and that overseas votes would not be lost in the post. The last is of particular importance as the government are now planning to scrap the 15-year rule that bans long-term expatriates from voting in UK elections.

“That’s a potential five million additional expats who will be eligible to vote,” says Summers, “How are you going to service them?” The answer to that is via the postal vote, and the limitations of this traditional method make the case for electronic voting even stronger.

“Postal voters authenticate themselves with a signature – mine is easily forgeable – and their date of birth,” says Summers. “The traditional methods are not secure. With online voting we can use facial biometrics to compare a person’s digital facial portrait – a selfie, if you like – with their ID, and we can verify there is a match.

“The next problem is security, and putting your ballot in an envelope is not secure. We have very, very strong application level cryptography. The moment a voter casts their ballot we encrypt it on the voting side and digitally sign it as a method of proving the integrity. Additionally, when postal voters put their vote in the post box they have no way of checking it was received or counted, so you have no verifiability. We have a number of tools that voters can use to verify their vote was received and was included in the final tally.”

Nowhere is the importance of the postal vote clearer than in the case of Brexit. “You could argue that the outcome would have been different,” says Summers. “Lots of expats voted by post and a lot of the votes didn’t come back before the close of the election count. We have an office in Amsterdam and one of the guys plays in a local rugby club in The Hague. There are ten Brits on that team and six of them received their postal vote after the close of the election. If you’re an expat living overseas then are you going to vote for or against Brexit? If those voters had voted then the outcome could have been completely different.”

Yet the benefits of accuracy, transparency, verifiability, and accessibility are easily side-lined by one bloodcurdling word. Hackers. If Hillary Clinton’s emails can become your bedtime reading, isn’t it possible – nay, probable – that elections will be hacked, falsified, and corrupted?

“The easiest election to hack is a paper election,” says Summers. “It is important to educate people on the difference between election information systems, which the DMC use, and voting systems. The protections of voting systems are above and beyond anything you will use in any other online application, including online banking and ecommerce solutions.”

As a representative of Smartmatic, Summers would say this, but they and other companies have created a wide variety of solutions which – even if imperfect – are vulnerable to fewer mistakes than Deidre in the village hall. Even if there are flaws, it seems important to iron these out now – before 2020 – to ensure the success of electronic voting in the future.

Although the House of Commons’ Commission on Digital Democracy recommended that the UK should adopt electronic voting by 2020, there is little evidence that steps are being taken towards this goal. “I’d love to turn around and say I think steps are being taken but there is a lack of willingness to acknowledge the shortcomings that we have in terms of UK elections,” says Summers. For now, then, the debate rages on. Should we stick to the tried-and-tested, or should we transform the electoral process forever? I know – let's vote on it. 

Amelia Tait is a technology and digital culture writer at the New Statesman.